The organisation of internal structures varies between snake families and genera. However it is important to know the approximate position of the organs during a physical examination. The following is a generalisation if the snake's body is divided into thirds from snout to vent: | The organisation of internal structures varies between snake families and genera. However it is important to know the approximate position of the organs during a physical examination. The following is a generalisation if the snake's body is divided into thirds from snout to vent: |